Is Google AdWords Testing Underlining Display URLs?

Ronnie Jones shared a screen shot on Twitter of the Google search results, specifically the AdWords listings, showing Google underlining the display URL of the ad.

Ronnie promised there was no extension or third-party behavior triggering the URL to be underlined. He said it is on and off on some browsers in his office, depending on the query and time they search. So I guess it isn't specific to one browser, but maybe a test Google is trying on the AdWords results.

Here is his screen shot:

It looks really bad and ugly to me, so I am still surprised Google would consider testing this but who knows. They've tested uglier UIs before.